获取同一个表中的 年龄相同的的人员

SELECT S1.Sname,S1.sex FROM student AS S1, student AS S2 WHERE S1.age = S2.age AND S1.Sname <> S2.Sname GROUP BY S1.Sname ORDER BY S1.age

 学生表中 求出 年龄相同的同学 列出同学的名称和年龄

-- 学生表
CREATE TABLE student   
(Sno    varchar(20)    NOT NULL,
 Sname  varchar(20)    NOT NULL,
 sex   varchar(20)    NOT NULL,
 age   INT            NOT NULL,
 dept  varchar(20)    NOT NULL,
 PRIMARY KEY (Sno)
);

INSERT INTO student VALUES ('9512101','李勇','男',19,'计算机系');
INSERT INTO student VALUES ('9512102','刘晨','男',20,'计算机系');
INSERT INTO student VALUES ('9512103','王敏','女',20,'计算机系');
INSERT INTO student VALUES ('9521101','张立','男',22,'信息系');
INSERT INTO student VALUES ('9521102','吴宾','女',21,'信息系');
INSERT INTO student VALUES ('9521103','张海','男',20,'信息系');
INSERT INTO student VALUES ('9531101','钱小力','女',18,'数学系');
INSERT INTO student VALUES ('9531102','王大力','男',19,'数学系');